Button-hole sewing-machine



(Model.) 3 Sheets-Sheet 1. J. W. FURBUSH. BUTTON HOLE SEWING MACHINE.

Patented Apr.24, 1883.

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YInh/ENTER (Model.) s sheets-Lsheet 2, J. W. FURBUSH. BUTTON HOLE SEWING MACHINE.V No.' 276,387. Patented Ap1.24,1888.

(Model.) i 3 Sheets-Sheet J. W. FURBUSH. l

BUTTON HOLESEYVING MACHINE. No. 276,387. Patented pr.24,1883. A

N. PETERS.. 92mm Lnhogmnnur. wammgton, t4 C.

. in the county ot' Essexand State of Massachuizo A both the loopers and the looper-bar are adl securing uniformity of the stitches about the jects by the mechanism shown in the accoma plan of the same with the presser-feet spread- 4o 'ing the button-hole apart. Fig. 3 is a longigage is provided for taking more or less hold f 'UNITED' STATES" PATENT l 'OFFICE'.

JAMES vv. rUaBUSH, or LYNN, MASSACHUSETTS.

`BUTTON-Hcti-: SEWING-MACHINE.-

SPECIFICATION forming part of Lettersratent No. 276,387, dated April `24, 1883.

Appiieation inea November 21, 1882. (Model.)

To all whom it may concern Be it known that I, J AMES W. FURBUSH, a citizen of' the United States, residing at Lynn,

setts, have invented new and useful Improvements in Button-Hole Stitching-Machines, ot which the following is a specification.

Theimprovementsin button-holesewing-machines herein described relate to improvements in the clampingidevices, the spreader-bar, the `looperbar,the adjustable gage, and thefrictionband around the feed-cam; and the objectof my improvements is, first, to provide clamping mechanism forholdingtheclothtotheclothplate and spreading mechanism for spreading the unsewed button-hole for sewing, by which mechanism both the clamping and the spreading are accomplished byia single movement of the hand of the operator ofthe machine; second,to provide mechanism bywhich thespreader-bar, holding the loop-spreaders, can be adjusted laterally and at right angles to lateral motion; third, to provide mechanism by which justable laterally and vertically; fourth, to provide mechanism by which an adjustable of the edge ot' the material to be stitched about thebutton-hole; fifth, to provide mechanism by which a friction-band is secured around the periphery of the feed-cam for the purpose of eye of the button-hole; and I attain the obpanying drawings, in Whichi Figure l, Sheet l, represents the clamp, and is a plan with the presser-feet upon the cloth, clampingitto the cloth-plate beneath. "Fig.2is'

tudinal vertical section of the same through the middle ot' tlzieclamp.` Fig. 4 is a vertical section of Fig. 1 in line a' x. Fig. 5 is a plan, the cam-barand leverbeing removed. l Fig. 6 represents the standard and arm of the machine and the-needle-bar, and is a side elevation showin g the operating devices of this part ot' the machine. Fig. 7 is a plan ofrthe standard in line y y. Fig. 8 is a vertical secthe table under the needle-bar, the upper plate being removed. Fig. 10 is a vertical section ot' Fig. 9in line X X. Fig. 11 is a section of the looper-bar, a part of' the spreader and bar being shown in the rear. Fig. 12 is aperspective view of the loopers, looper-bar, and a .portion of an arm towhich the looper-b lr is ot' which are fastened `to a cross-lianes shown in the figures; E, upright standards bearing a cam-bar holder; F, movable cam-bar; F', cambar holder passing through said cam-bar, having its ends supported by the standards E; G, cams bearing upon the arms D to clamp the cloth to the plate A; H, a cam on bar F, operating to spreadthe arms D; I, a lever attached tothe bar F, as shownin Figs. l, 2, 3, and 4. When the clamp is not in use its position is shown in Fig. 3. When the cloth is to be clamped to thecloth-plate and the button-hole spread for sewing the lever is pressed backward into the position shown in Figs. land 2. When the button-hole is sewed the lever is raised to the position shown in Fig. 3,.

K is a cam-pin, its lower end fitting into a groove Vin the feed-cam, (shown in Fig. 9;) L, a cylinder in which is inclosed said cam-pin; a, a, spiral springs under the arms D, upon which bear the cams on bar F; a', a rest or stay under cam-bar F; b, a vspiral spring in cylinder L; c o, plates or rests upon which the arms D rest, and which plates are attached to said arms; c c', the edges of the plates c c; d, a piece of cloth having button-hole; e, the button-hole; M, a standard, (shown in Fig. 9;)

N, an overhanging arm joined to the standard M and bearing the needle-bar; O, the needle-bar; O', the needle-head, movable `on the.;` arm N and carrying the needle-bar laterally;

O2, a sliding bar movinglaterallyin the groove of a lug which is secured to the under side of the arm N. (See Fig. 7.) One end of said sliding bar is secured iirinly to the needlehead by its screw and its other end is joined to the link O3 by a screw. (Y)3 O4 are links; O5 O6, a lever. Said links and lever are movable at their connections, and in this way the needle-head 0' is joined to the cam-wheel W, which revolves on the vertical shaft Pt, (see Fig. 7,) and thus the cam-wheel NV, by means of the said sliding bar O2, the said linksO3O4, and the lever O5 O6 and screwsf and f', are connected with the needle-head 0' for the purpose of moving said head and the needle-bar carried thereby laterally, that the needle may alternately descend in different vertical planes for forming the overseaming or button-hole stitch as the needle passes alternately through and over the edge of the material sewed in forming the button-hole stitch.

The outward throw of the needle is always the same; but in order to make the needle take more or less hold of the edge of the material about the button-hole the inward throw of the needle must be made adjustable. This I accomplish bythefollowing-described mechanism, (see Figs. (5 and 7:) P is a thumb-screw passing through a slot, P', in the slotted lug P2, which is attached by a screw to the side ofthe arm N.y Said thumb-screw passes into the elbow P4, (see Fig. 7,) which elbow is held to the under side ot' the arm N by a screw,f2, (see Fig. 8,) and which is also joined to Jthe link P3 by another screw,f, on which it moves as a pivot.` Said links O3 and P3 form atf' a toggle-joint, which is operated from the cam W by the lever O5 OG and link 04, and said links O3, O, and P3 pivot on said screw j". 1f, therefore, the thumb-screw P be moved laterally, motion is communicated by the elbow P4 to the link P3, which operates on the toggie -joint. For example, take Fig. 7. The thumb-screw P is at the extreme left in the slot PZ. Move the thumb-screw to the eX- treme right, thebentline z z will become nearly straight and the link P3 Will be pushed laterally, so that the links P3 and O3 will also be in nearly a straight line in reference to each other, and the link O3 and slide O2 will push outward the head O'. So any change of P from left to right or right to left will, though slightly, change the position of the needlehead 0', carrying the needle-har O, and consequently adjust thestitch with reference to the edge of the button-hole.

The cam W has a circular groove in its upper side, into which lits a pin (see dotted lines, Fig. 7.) in the end ofthe lever 06, and the lever OG 05 is pivoted at f. Consequently the spaces occupied by the links O", U3, and P3,

-movable at their connection, are lengthened and shortened alternately as the cam revolves on the shaft R, thereby causing the needlebar to descend in different planes.

. Q is the main shaft by which the needle-bar 1s moved up and down; Q',bevel-gears on the main shaft; R, vertical shaft, whose bevelgears R' engagethe bevel-gears Q'. f represents the screws uniting and holding the arms and levers.

S represents a table or table-bed under the needle-har, (see Fig. 9;) S', the feed-cam covering segmental gears, T, a sector ofthe driving segmental gears; T', a spur or driving wheel geared-and attached to a driving-shaft, T2, T3 and T4, segmental gears, partly shown in Fig. 10. The action of this gearing is fully -explainedin Patent No. 207,173.

U is a friction-band in the groove of the edge of the feed-cam S' g', a groove in thefface of said feed-cam; hand h', loopers; i, looper-bar; j, holder ot' looperbar; 7c, set --screws to adjust loopers; k', set-screws holding looper-bar to the holder; k2, screws holding the looperholder to an arm, r,- l, a spreader-bar; l' and l', prongs to the spreader; m, a slot in the spreader bar, in which the position 'of the spreaderis changed; m', slot in spreader-bar, through which the spreader is adjustable horizontally; a, set-screws, by whichAthe position of the spreader, when changed, is set fast; r, an arm, to which the looper-bar holder is fastened by the screws k2, and said arm is attached to and actuated by acam-wheel on the vertical shaft R. (Said cam -wheel is not s hown in drawings.)

, r' is an arm, to which the spreader-bar l is attached, and which is actuated by a camwheel on shaft R. (Not shown in the drawings.)

Having thus designated and explained the drawings and the letters thereon, 1 will now more particularly point out the use and operation of my improvements, and first illustrate the clamping of the cloth to thetable by means ot' presser-feet by a single cam motion. Fig. 4 in the drawings shows the cam -bar F, which moves upon a bar,'F', passing through the said cam-bar F, and the ends otwhich eX- tend through and are supported by the standards E. Upon said cam-bar are the cams Gr G, and between them is a cam, H, of peculiar form, shaped somewhatlike atruncated wedge, and the face of which is concave. When the lever I, standing as shown in Fig. 3, is depressed backward in the position shown in Fig. l, the cams G G strike upon the arms D 1), which carry the presser-feet C C. This pressure brings the presser-feet upon the cloth, as shown in Fig. l, and the cloth is clamped to the cloth-plate A, and by continued depression ofthe lever the cam H (see Fig. 3) enters between the plates or .rests c c at the edges c' c', (see Fig 5,) and thus spreads the arms D D, which carrythe presser-feet, spreading the button-hole c of the cloth d, as shown in Fig. 2. A rest, a', will be observed in Fig. 4 under the cam-bar. When the cam-bar strikes upon this rest the lever cannot be depressed farther, and the danger of breaking the arms D D is avoided.

Fig. 9 shows the bed of a table and the feed- IOO IOS

cam under the needle-bar, the plate covering the screw being removed, and shows the sector Tand the driving'geared wheel T'. These engage the segmental gears T3 and T, partly shown in section, Fig. 5 also the friction-band u, which lies in the groove around the rim of vthe feed-cam S', and is keyed by a slotted block, p, said slot not being shown in the drawings, and screwp' and one end ofthe band is secured in the bed S. (See Fig. 10.) The band is immovable.

'lhe machine in operation goes three times as fast around the eye of the button-hole as downits sides, and this tends to throw or to speed too fast, and is likely to make too long stitches. The friction-band checks the speed Vand steadies the cam, and the friction isregulated by the slotted block p and set'screw p'. The shaft 'I2 aud the groove g in face of feedcam S' are also seen.

Fig. 12 is an enlarged view of the j loopers and looper-bar and the screws adjusting the j same, and Fig. 11 shows how the parts are joined and secured. The loopers can be moved and set in any desired direction, and theloopemr-bar t' is round where it enters the bar-holderj, so it can be turned in any direction de- Sirable in operation and secured by the setscrew K'. Fig. 13 shows a part elevation and part section of the spreader-bar l and the arm r' united to the bar by screw n, and Fig.` 14 is a vertical section through the spreader l' in line 2 2, and the slot m'n the bar. `This allows the spreader to be adjusted, and when thus adjusted it is securedA by the set-screw a'. The sloten, alsoin Fig. 13, enables one to lengthen or shorten the spreaderbar Zand securethe saine by screw` n.

The object of having theloopers and spreader adjustable is as follows :r When the machine is put together there is always more or less variation in the Vholes in the castings, it being almost impossible to get two machines exactly alike. The slots and set-screws above describe enable the machinist quickly to adjust the loopers and spreader-points in their relation to each other. i Again, when it is necesgage or take a less deep,

sary to narrow the stitch inthe material the position of the looper and spreader-points must be changed, at least in extreme changes-as-from cloth to kid work, the-cloth requiring a deeper stitch than kid-work. The arms 'r and r' are arranged and operated in the same manner as in the Union` button-hole machine.

What I claim as my invention,'and desire to secure by Letters Patent, is

l. In abutton-holesewing-machine, the combination of the plates A and B,the standards E, the cam-bar holder F', the cam-bar F, having thereon cams G G, thelever I, the arms D,

the presser-feet C, the spiral springs a, and the rest a', substantially as shown, and for the purpose specified. Y

2. In a button-hole sewing-machine, the combination of the plates A and B,.the standards E, the cam-bar holder F', the cam-bar F, having thereon a cam', H, the arms D, thepresserfeet C, the spiral springs a, and the `plates fc, whose adjacent edges c' form a truncated wedge-sha pedopenin g, whereby by depressing the lever I said cam H enters said truncated wedge-shaped opening and spreads the arms D, substantially as shown and described.

3. In a hutten-hole sewingmachine, the combination of the plates A and B, the standards E, the cam-bar holder F', the cam-bar F, having thereon the cams H and GG, the lever I, the armsD, the presser-feet G, the spiral springs a, and the plates c, whose adjacent edges c' form a truncated Wedge-shaped opening, substantially as shown, and for the purpose described.

` 4. In a button-hole sewing`machine,thecom bination of the overhangingarnii N, the needle-bar O, the needle-head 0', vthe sliding bar 02, the arms 03 and O4, the leverI 05 O6, the cam-wheel W, the screws j',n the thumb-screw P, the slotted lug P2, the lever P4, and link P3, substantiallyin the manner and for the purpose shown and described.

5. In a button-hole sewing-machine, the combination of the looper-bar i, having adjustable loopers h and h' r, joined to fthe substantially in pose described.

6. In a button-hole sewing-machine, the combination of the spreader-bar l, having therein slots m and m', the'spreader l', the arm r', to

and set-screws 7c, and the arm bar-holder by the screws k2, the manner and for the purwhich the spreader-bar is united by set-screw' n, and the set-screw a', substantially in themanner` and for the purpose shown and described. i

JAMES w. FUnBUsH.

Witnesses: i

JrL. NEWTON, J. C. LITTLEFIELD. 

